body{
    font-family:Arial,sans-serif;
}

.hfcs-container{
    max-width:800px;
    margin:40px auto;
    background:#fff;
    padding:30px;
    border-radius:20px;
    box-shadow:0 4px 25px rgba(0,0,0,0.08);
}

.hfcs-container h2{
    text-align:center;
    margin-bottom:30px;
}

.hfcs-grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:20px;
}

.hfcs-field label{
    display:block;
    margin-bottom:8px;
    font-weight:600;
}

.hfcs-container input,
.hfcs-container select{
    width:100%;
    padding:14px;
    border-radius:12px;
    border:1px solid #d1d5db;
    margin-bottom:18px;
    box-sizing:border-box;
}

#hfcs-calculate{
    width:100%;
    padding:16px;
    border:none;
    border-radius:14px;
    background:#16a34a;
    color:#fff;
    font-size:17px;
    cursor:pointer;
}

#hfcs-results{
    margin-top:30px;
}

.hfcs-card{
    background:#f9fafb;
    padding:20px;
    border-radius:16px;
    margin-bottom:18px;
    border-left:5px solid #16a34a;
}

.hfcs-card h3{
    margin-top:0;
}

.hfcs-highlight{
    font-size:32px;
    font-weight:bold;
    color:#16a34a;
}

@media(max-width:768px){

    .hfcs-grid{
        grid-template-columns:1fr;
    }

    .hfcs-container{
        margin:15px;
        padding:20px;
    }
}